XML 57 R40.htm IDEA: XBRL DOCUMENT v3.20.2
Retirement Plans (Tables)
3 Months Ended
Jul. 31, 2020
Retirement Plans [Abstract]  
Components of Net Periodic Pension Income for Defined Benefit Plans
The components of net pension income for the defined benefit plans were as follows:

 
Three Months Ended
July 31,
 
   
2020
   
2019
 
Service cost
 
$
333
   
$
224
 
Interest cost
   
4,521
     
5,834
 
Expected return on plan assets
   
(9,378
)
   
(10,059
)
Amortization of prior service cost
   
(25
)
   
(19
)
Amortization of net actuarial loss
   
1,987
     
1,600
 
Net pension income
 
$
(2,562
)
 
$
(2,420
)